I bought a demo set for usd330. The store owner assured me that this headphone was rarely used so it was almost as good as new. I also enjoy 660s2 a lot , it offers a different but equally enjoyable sound from my Grados and staxs. I even bought a replacement cable from ebay, please see the...

I finally decided to ditch my 507 after 4 yrs plus of owership due to one reason . It consumes batt considerably even when it's off . Switched to a shanling m3 ultra , sound wise on par but better batt life.

Underpriced? When 660s2 just released, many panned it to be overpriced as 6xx was much cheaper but slightly lower sq .

The rs2x will gain some thickness in the bass over some time of usage. I quite enjoy it for rap.

Hagerman tuba suits the hd660s2 very well but it is no longer for sale.

Online meetings hmm maybe grado should release special edition of grado rs2x with mic and I will use it for my work purpose

Rs2x is not thin and harsh at all on my setup . If I were to describe the sound it would be smooth, detailed , neutral ,good mids (but less warm than rs1x). I feel it's the grado that sound most monitor like if that makes sense.

I finally bought the hd660s2 , 15 years after I had sold my hd600. Pairs very well with my setup , offers a different sound from grado and stax.

When i just joined headfi , around late 2004 ( under different profile) , this amp was badly trashed by many for having cheap parts. Only a handful like zanith (if i remember correctly) praised it for being a good match with grado. Now I want to get one just for collecting as it's getting rare...

I am bidding for it but I wonder if the ra1 PSU accepts 230v

Yeah i'd love to see a comparison between the two. Sr007 can't do well with STAX amps , i remember the disappointment i had when pairing it with SRM 727 many years back. That's part of the reason why i moved to SR009S.

Never heard the ps2000e before so i can't comment . RS1X is a great headphone to me ,especially for its mid range! it just feels more forward sounding than RS2X

Have to hear it your self Just remember sr007 needs serious juice otherwise its dull like f

Mad ear+ no longer available ever since Dr Lloyd stopped making amp as he turned blind. What a pity.

Is hagerman tuba a good match for hd660s2?